We have a 6.6KW system that is connected to the grid. I want to add the option to go off-grid, yet stay connected to the network - ie a switch that will allow for either.
I like the concept of redundancy and this also gives me the option to disconnect from the network if need be.
Anything I should consider with doing this? How much would it cost to have an installer hook up a basic (very small) battery bank to an existing solar setup.